Trunk muscle activation patterns during active hip abduction test during remission from recurrent low back pain: an observational study

Table 2 Onset of muscle activation during the active hip abduction test

	Non-LBP group (n = 17)	rLBP group (n = 17)	p-value	Effect size (d)	Power
Right
Ipsilat external oblique	35.5 ± 47.9	24.8 ± 23.6	0.877	0.28	0.28
Contralat external oblique	68.6 ± 102.3	61.9 ± 73.4	0.945	0.08	0.05
Ipsilat TrA/IO^*	-3.0 ± 16.2	36.3 ± 20.0	< 0.001	2.16	1.00
Contralat TrA/IO^*	-11.5 ± 13.9	24.4 ± 32.3	< 0.001	1.45	0.98
Ipsilat erector spinae	50.8 ± 69.4	80.2 ± 63.6	0.139	0.44	0.23
Contralat erector spinae^*	76.1 ± 84.9	183.9 ± 114.6	0.001	1.07	0.84
Left
Ipsilat external oblique	62.8 ± 80.3	44.2 ± 65.4	0.617	0.25	0.25
Contralat external oblique	56.3 ± 97.9	38.9 ± 44.8	0.877	0.23	0.10
Ipsilat TrA/IO^*	-7.2 ± 18.6	29.6 ± 44.3	< 0.001	1.08	0.87
Contralat TrA/IO^*	-10.1 ± 12.5	23.3 ± 17.2	< 0.001	2.22	1.00
Ipsilat erector spinae^*	71.1 ± 80.1	163.8 ± 120.1	0.011	0.91	0.71
Contralat erector spinae^*	60.7 ± 70.5	133.9 ± 98.6	0.008	0.85	0.65

Values are mean ± standard deviation. *P-value < 0.05. rLBP: recurrent low back pain; Ipsilat: ipsilateral; Contralat: contralateral; TrA/IO: transversus abdominis/internal abdominal oblique

ISSN: 1471-2474